| 摘要 |
<p>PURPOSE:To increase the speed of plotting by providing a scrolling ring buffer and a fixed buffer for display of fixed information. CONSTITUTION:Graphic forms written in, for example, address 40000 or higher addresses in a ring buffer 10 pass round the an address 00000 side and are plotted, but this passing-round does not occur in a fixed buffer 9. Therefore, the start address is rewritten to scroll information in the ring buffer 10, and information in the fixed buffer 9 is displayed without scrolling. Thus, the lower half of a picture can be scrolled with the upper half fixed without writing data of the fixed data again in a new address at each time of scrolling, and images abundant in variation is quickly displayed.</p> |
